Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
hang song » nang song, bang song, hang cong
hang nong » thang long, han tong
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
ho chieu » hoc thieu, doi chieu, mot chieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (ho chieu)) tinh - hanh tranh cua ((hang song) OR (hang nong)) van thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - hanh tranh cua ((hang song) OR (hang nong)) van thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) tinh - hanh tranh cua ((hang song) OR (hang nong)) van thanh tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) tinh - hanh tranh cua ((hang song) OR (hang nong)) van thanh tap*.